I recently learned something new about those tweety birds we hear in the tall trees all along our school run, cycling or walking past the golf course. Near the school end, lots of coal tits, a name with which I was barely familiar. Near our end, lots of wrens. I had an idea that wrens were rare and secretive and tiny, so it had not occurred to me they were responsible for that noisy cheerful chatter. Perhaps it's hard to spot one but they're loudly singing.

These I learnt last week helped by an app named “whoBIRD” which, as you may guess, listens for bird calls and displays the most likely matches. It's delightful to identify real birds, and surprisingly successful if they're not too far away.